NATHAN GRUENHAGEN (M.D.) – Diagnostic Radiology Physician, NPI 1013442425
Diagnostic Radiology Physician
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Profile Insights
NPPES metrics only — not quality of care.
532 DIAGNOSTIC RADIOLOGY in OR
Provider Addresses for NATHAN GRUENHAGEN (M.D.)
3600 NW Samaritan Dr
Corvallis, OR 973305472
Phone: (541) 768-5111
Type: Location
930 SW ABBEY ST STE B
NEWPORT, OR 973654820
Phone: (541) 265-2244
Type: Location
2401, West University Avenue, Muncie, Delaware County, Indiana, 47303, United States
MUNCIE, IN 473033428
Phone: (765) 741-1095
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2023-05-25
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20230525002312 | I | Diagnostic Radiology | OR | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 70450 | Ct scan head or brain without contrast | 162 | 154 | $0 |
| 70553 | Mri scan of brain before and after contrast | 103 | 101 | $0 |
| 70551 | Mri scan of brain without contrast | 90 | 89 | $0 |
| 71045 | X-ray of chest, 1 view | 67 | 67 | $0 |
| 70498 | Ct scan of blood vessels of neck with contrast | 56 | 56 | $0 |
Insurance plans in this area (ZIP 97330)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Physician Assistant | OR | |
| Internal Medicine | OR | |
| Nurse Practitioner | OR | |
| Nurse Practitioner | OR | |
| Physician Assistant | OR | |
| - | LA | |
| - | OR | |
| Certified Registered Nurse Anesthetist (Crna) | OR | |
| Physician Assistant | OR | |
| Certified Registered Nurse Anesthetist (Crna) | OR |
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